/C++/How to delete a 2d dynamic array in c++

How to delete a 2d dynamic array in c++

for (int i = 0; i < numRows; i++) {
    delete [] world[i];
//    world[i] = 0;  // <- don't have to do this
}
delete [] world;  // <- because they won't exist anymore after this
world = 0;

Source: cplusplus.com

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